For the gaps in between - make the gap bigger or smaller by changing that 2px.
.scsocialfindus .scsocialfindus-btn{
margin: 0px 2px;
}
Float bottom right of the page.
div.scsocialfindus {
position: fixed;
right: 0px;
bottom: 0px;
width: 205px !important; /* You may need to change the width on this too since it wraps lines when you add margin in between the buttons. */
}
Hope this helps!
-Melissa